Northside High School Cougars Shop Features Northside High School Cougars T-Shirts, Sweatshirts, Hats & Jerseys. SpiritSchoolApparel.com is your leading source for Northside High School Cougars Apparel, Merchandise, Gear, Sportswear and Clothing for every sport and activity, including, Northside High School Cougars Soccer, Northside High School Cougars Football, Northside High School Cougars Basketball, Northside High School Cougars Baseball, Northside High School Cougars Softball and Northside High School Cougars Lacrosse! Choose a variety of Northside High School Cougars Merchandise including T-Shirts, Sweatshirts, Hoodies, Hats and Jerseys. Customize your design and personalize the back of your Northside High School Cougars Gear to show your Cougars spirit and support your favorite sport team!